Two school epidemics.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D004739:England; D005260:Female; D005517:Foodborne Diseases / Q000453:epidemiology*; D005759:Gastroenteritis / Q000453:epidemiology*; D006801:Humans; D007046:Hysteria / Q000453:epidemiology; D008297:Male; D010555:Personality Inventory; D011581:Psychological Tests; D012764:Shigella sonnei / Q000472:pathogenicity